I remember that car. Centerline has a 3-5/16" BS or 4-7/8" BS. I guess they used what they acquired for that car and then added the spacers to get them to fit the car. I have been trying to order wheels the past couple days but I'm finding Summit and Jegs don't have much in stock and wheels are on back order from Centerline. I'm still debating those versus Cragars and still hunting for just the right combo with tires.
In the interim, Motor was pulled and torn apart last night while getting the new motor and a new M22 ready to go into the car. Still like the Torque Thrust wheels and will use them when I need to put some highway miles on it, but for street cruising I'd like to fit some new wheels with bigger bias ply tires for that menacing look.